Ultrafast angular momentum orientation by linearly polarized laser fields.
Ultrafast angular momentum orientation by linearly polarized laser fields.
复制标题
DOI：
10.1103/physrevlett.103.223002
复制
发表时间：
2009-11
影响因子：
8.6
通讯作者：
K. Kitano;H. Hasegawa;Y. Ohshima
中科院分区：
文献类型：
--
作者：
K. Kitano;H. Hasegawa;Y. Ohshima
我们从理论上证明并实验验证了一对线极化强飞秒脉冲可以在超快（约ps）时间尺度上产生具有定向旋转角动量的分子系综，当它们之间的延迟和互极化适当安排时。+M和-M子能级的不对称分布依赖于第一和第二脉冲在受激拉曼激发下产生的旋转波包之间的量子干涉。目前的方法提供了时空传播的系综，其经典视角是分子沿顺时针或逆时针方向旋转。
We theoretically show and experimentally verify that a pair of linearly polarized intense femtosecond pulses can create molecular ensembles with oriented rotational angular momentum on an ultrafast (approximately ps) time scale, when the delay and the mutual polarization between them are appropriately arranged. An asymmetric distribution for +M and -M sublevels relies on quantum interference between rotational wave packets created in stimulated Raman excitation by the first and second pulses. The present approach provides spatiotemporally propagating ensembles, of which the classical perspective is molecules rotating in a clockwise or counterclockwise direction.